One of the U.S. Republican Party's leading voices on foreign affairs says the civil war in Syria and the flow of migrants into Europe represents one of the most serious crises the West has faced since World War II. Senator John McCain, an Arizona Republican who was the party's presidential nominee in 2008 and is now chairman of the Senate Armed Services Committee, told VOA's Serbian service that Europe's migrant crisis is a direct result of what he called the "failure" of U.S. policy in the Middle East. (VOA)